<html>
<script>
    var name = "1";
    greeting = "Hellow" + name;
    // 1 *= 3;
    var counter;
    counter++;
    var o ={x: 1,y:2};
    delete o.x;
    alert(greeting); //弹出信息
    // window.close(); // 关闭浏览器窗口
    console.log("greeting",greeting);
    var x ="30";
    console.log("Math.sin(x)",Math.sin(x));
</script>

<head>
    <title>放置文章标题</title>
</head>

<body>
    <div>
            <h1>Debug Log</h1>
    </div>
</body>

</html>                                                                       